--- a/dom/cache/Context.cpp
+++ b/dom/cache/Context.cpp
@@ -866,17 +866,17 @@ Context::Dispatch(Action* aAction)
     return;
   } else if (mState == STATE_CONTEXT_INIT ||
              mState == STATE_CONTEXT_PREINIT) {
     PendingAction* pending = mPendingActions.AppendElement();
     pending->mAction = aAction;
     return;
   }
 
-  MOZ_ASSERT(STATE_CONTEXT_READY);
+  MOZ_ASSERT(mState == STATE_CONTEXT_READY);
   DispatchAction(aAction);
 }
 
 void
 Context::CancelAll()
 {
   NS_ASSERT_OWNINGTHREAD(Context);